CN102036401A - Multi-carrier channel configuration method, device and communication system - Google Patents
Multi-carrier channel configuration method, device and communication system Download PDFInfo
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Abstract
The embodiment of the invention provides a multi-carrier channel configuration method, device and communication system. The multi-carrier channel configuration method comprises the following steps: determining the number of carrier channels for carrier aggregation, wherein the number of the carrier channels is at least three; acquiring carrier channel configuration information of the determined carrier channels; determining the arrangement sequence of the carrier channels on a frequency domain based on the carrier channel configuration information and carrier channel orthogonal constraint conditions; and in the arrangement process, determining that signals generated after the arrangement comprise at least one null subcarrier in the center of a frequency band for transmitting the signals and the sum of the bandwidth occupied by all the null subcarriers among the carrier channels and the protection bandwidths of two carrier channels on the edges is the minimum among various carrier aggregation modes. The embodiment of the invention also provides a corresponding device and system. By using the method, the device and the system, the frequency spectrum utilization rate can be effectively increased.
Description
Technical field
The embodiment of the invention relates to communication technical field, particularly a kind of multiple carrier channel collocation method, device and communication system.
Background technology
The OFDM technology has been widely used in many communication systems, and an ofdm signal is made of a plurality of mutually orthogonal subcarriers, can F0 represents the bandwidth of subcarrier, and unit is Hz.For example F0 is 15kHz in the LTE system.A carrier channel is made of the experimental process carrier wave, can number carrier channel, and the sub-carrier number in i carrier channel is represented with K (i).For example, the channel width BW of LTE carrier channel
Channel(i) have following several: 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, 20MHz, and corresponding sub-carrier number K (i) is 72,150,300 in each carrier channel, 600,900,1200.Further, per 12 subcarriers constitute 1 Resource Block (Resource Block), thereby corresponding sub-carrier number is converted to number of resource blocks N
RB(i) be 6,15,25,50,75,100.Above-mentioned Resource Block number is also named the transmission bandwidth configuration of carrier channel.The transmission bandwidth configuration can be expressed as BW
Tx(i), unit is MHz.At two channel edges of carrier channel, the difference of transmission bandwidth configuration and channel width is a boundary belt, uses BW
Guardband(i) expression, unit is MHz.Fig. 1 is channel width in the prior art, transmission channel configuration and the schematic diagram of protection bandwidth on frequency domain, and the direct current of the corresponding base band of the gap carrier wave of channel center is because the interference that possible carrier leak causes can not be used to transmit data when descending.
In addition, in order to improve traffic rate, the signal bandwidth of the required support of existing communication system is more and more wideer.For example the maximum bandwidth that single carrier channel (Component Carrier) is supported in the LTE system is 20MHz, but in order to satisfy the requirement of ITU to the 4th third-generation mobile communication system, LTE-A need support that maximum bandwidth is the signal of 100MHz.Need a plurality of LTE carrier channels be condensed together by various technological means, to form the wideer multi-carrier OFDM signal of bandwidth.
A kind of scheme that realizes multi-carrier polymerizing is arranged in the prior art, as shown in Figure 2, is that the single carrier wave in the single-carrier system is made simple arrangement, and each single carrier channel edge all reserves boundary belt.With LTE is example, can arrange the 20MHz carrier channel of two LTE in the channel of 40MHz, and makes boundary belt with the bandwidth of about 4MHz, and the effective bandwidth that is used to transmit data is 200 Resource Block, perhaps is 2400 subcarriers, and the availability of frequency spectrum is 90%.
In the above-mentioned prior art, the carrier channel aggregation scheme when carrying out the multiple carrier channel signal configures can not effectively improve the availability of frequency spectrum.
Summary of the invention
The purpose of the embodiment of the invention provides a kind of multiple carrier channel collocation method, device and communication system, with effective raising availability of frequency spectrum.
For achieving the above object, the invention provides a kind of multiple carrier channel collocation method, comprising:
Be identified for the number of the carrier channel of carrier aggregation, the number of described carrier channel is at least three;
Obtain the carrier channel configuration information of determined carrier channel;
Determine described carrier channel putting in order on frequency domain according to described carrier channel configuration information and carrier channel condition of orthogonal constraints; when arranging, determine to arrange the center of signal on the frequency band of the described signal of transmission that the back generates and comprise at least one gap carrier wave, and the shared bandwidth of all the gap carrier waves between the carrier channel and the protection bandwidth sum that is arranged in two carrier channels at edge are that various carrier aggregation modes are minimum.
The embodiment of the invention also provides a kind of multiple carrier channel inking device, comprising:
Determination module is used to be identified for the number of the carrier channel of carrier aggregation, and the number of described carrier channel is at least three;
Acquisition module is used to obtain the carrier channel configuration information of the determined carrier channel of determination module;
Channel processing module; be used for determining described carrier channel putting in order on frequency domain according to described carrier channel configuration information and carrier channel condition of orthogonal constraints; when arranging, determine to arrange the center of signal on the frequency band of the described signal of transmission that the back generates and comprise at least one gap carrier wave, and the shared bandwidth of all the gap carrier waves between the carrier channel and the protection bandwidth sum that is arranged in two carrier channels at edge are that various carrier aggregation modes are minimum.
The embodiment of the invention also provides a kind of communication system, comprises above-mentioned multiple carrier channel inking device.
The multiple carrier channel collocation method that the embodiment of the invention provides; device and communication system; behind the configuration information that gets access to carrier channel; sub-carrier number and carrier channel condition of orthogonal constraints according to above-mentioned carrier channel are carried out the arrangement of carrier channel on frequency domain to carrier channel; determine to arrange the center of signal on the frequency band of the described signal of transmission that the back generates and comprise at least one gap carrier wave when arranging, bandwidth that all the gap carrier waves between described each carrier channel are shared and the protection bandwidth sum that is arranged in two carrier channels at edge are that various carrier channel arrangement modes are minimum.In the technique scheme each carrier channel between the gap carrier wave and the protection bandwidth sum that is arranged in two carrier channels at edge be that various carrier aggregation modes are minimum, thereby improved the availability of frequency spectrum.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply, apparently, accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is channel width in the prior art, transmission channel configuration and the schematic diagram of protection bandwidth on frequency domain;
Fig. 2 is a carrier aggregation schematic diagram in the prior art;
Fig. 3 is the schematic flow sheet of multiple carrier channel collocation method embodiment of the present invention
Fig. 4 is carrier channel polymerization schematic diagram one among the multiple carrier channel collocation method embodiment of the present invention;
Fig. 5 is carrier channel polymerization schematic diagram two among the multiple carrier channel collocation method embodiment of the present invention;
Fig. 6 is carrier channel polymerization schematic diagram three among the multiple carrier channel collocation method embodiment of the present invention;
Fig. 7 is carrier channel polymerization schematic diagram four among the multiple carrier channel collocation method embodiment of the present invention;
Fig. 8 is the structural representation of multiple carrier channel inking device embodiment one of the present invention;
Fig. 9 is the structural representation of multiple carrier channel inking device embodiment two of the present invention.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
The embodiment of the invention provides a kind of multiple carrier channel collocation method, and Fig. 3 as shown in Figure 3, comprises the steps: for the schematic flow sheet of multiple carrier channel collocation method embodiment of the present invention
Step 101, be identified for the number of the carrier channel of carrier aggregation, and the number of carrier channel is at least 3;
Step 102, obtain the carrier channel configuration information of determined these carrier channels;
What obtain in this step is the carrier channel configuration information that is used for the carrier channel of carrier aggregation, concrete can comprise transmission bandwidth configuration information and protection bandwidth information, and wherein the transmission bandwidth configuration information specifically can be represented with transmission bandwidth, sub-carrier number or Resource Block number;
Step 103, determine described at least three carrier channel putting in order on frequency domain according to above-mentioned carrier channel configuration information and carrier channel condition of orthogonal constraints; and when arranging; guarantee to arrange the center of signal on the frequency band of this signal of transmission that the back generates and comprise at least one gap carrier wave, and the protection bandwidth sum that guarantees the bandwidth that all gap carrier waves between the carrier channel are shared and be arranged in two carrier channels at edge is that various carrier channel arrangement modes are minimum.
Carrier channel condition of orthogonal constraints in the embodiment of the invention mainly is, the distance that is used between the centre frequency of any two carrier channels of carrier aggregation is the bandwidth of subcarrier and the integral multiple of frequency step, promptly for i in the system and k carrier channel (Component Carrier), distance R F between its centre frequency (i)-RF (k) is the bandwidth of subcarrier, be F0, and frequency step, be F1, integral multiple, that is to say that RF (i)-RF (k) is the integral multiple of the least common multiple of F0 and F1.
By above-mentioned arrangement mode, can make the multiple carrier channel signal that generates after the above-mentioned carrier aggregation comprise the band transmissions of at least one gap carrier wave at the center, the data of avoiding being transmitted when the central transmission data are disturbed by direct current leakage.
By above-mentioned technical scheme, make frequency bandwidth and the shared frequency bandwidth sum of the boundary belt minimum that the gap carrier wave is shared, thereby can improve the availability of frequency spectrum.
In addition, in the alignment processes of above-mentioned steps 103, the subcarrier of described at least three carrier channels can also be to be that symmetric arrays is carried out at the center with center gap carrier wave on frequency domain.It is concrete when above-mentioned carrier channel number is even number, above-mentioned at least three carrier channels are divided into identical two groups, be separately positioned on gap carrier wave both sides, above-mentioned center, and the subcarrier that makes above-mentioned at least three carrier channels is the center symmetry with center gap carrier wave on frequency domain; Perhaps when above-mentioned carrier channel number is odd number, above-mentioned at least three carrier channels are divided into identical two groups and a carrier channel that is positioned at the frequency domain center, the above-mentioned subcarrier that is positioned at the carrier channel at frequency domain center is the center symmetric arrays with center gap carrier wave, the subcarrier of above-mentioned identical two groups of carrier channels is separately positioned on the both sides of the carrier channel that is positioned at the frequency domain center, and the carrier channel of above rheme in the frequency domain center is the center symmetry.This centrosymmetric arrangement mode, make implement more simple.
The carrier channel configuration information that obtains at least three required carrier channels of carrier aggregation in the step 101 of above-mentioned technical scheme can specifically comprise:
From the configuration information of each pre-configured carrier channel, obtain the transmission bandwidth configuration information and the protection bandwidth of at least three required carrier channel of carrier aggregation.The configuration information of concrete above-mentioned carrier channel can comprise the configuration information of six kinds of carrier channels in the LTE system, also can comprise the configuration information of the carrier channel after six kinds of carrier channels are expanded in the LTE system.
The protection bandwidth sum that will make the shared bandwidth of all gap carrier waves between each carrier channel in the above-mentioned technical scheme and be arranged in two carrier channels at edge is that various polymerization methodses are minimum; the gap carrier number that intermediate demand inserted when any two carrier channels before needing to determine in determined at least three carrier channels were adjacent, and the required protection bandwidth of each carrier channel.
Wherein the required protection bandwidth of each carrier channel is usually based on prior art; by being made as fixed value behind compromise complexity and the out-of-band radiation rejection; for example for each carrier channel of LTE system; wherein channel width is that the protection bandwidth of the carrier channel needs of 1.4MHz is 0.1525MHz; channel width is that the protection bandwidth that the carrier channel of 3MHz needs is 0.1425MHz; channel width is that the protection bandwidth that the carrier channel of 5MHz needs is 0.2425MHz; channel width is that the protection bandwidth that the carrier channel of 10MHz needs is 0.4925MHz; channel width is that the protection bandwidth that the carrier channel of 15MHz needs is 0.7425MHz, and channel width is that the protection bandwidth that the carrier channel of 20MHz needs is 0.9925MHz.
The gap carrier number that intermediate demand inserts when adjacent for two carrier channels, two kinds of obtain manners are arranged, a kind of is to calculate or dispose the insertion carrier information in advance, this insertion carrier information comprises needs the gap carrier number that inserts between any two carrier channels in each carrier channel, when needed, obtaining the gap carrier number of calculating in advance or disposing according to described carrier channel configuration information gets final product, wherein, this insertion carrier information can obtain according to the carrier channel configuration information and the carrier channel condition of orthogonal constraints of each carrier channel; Another kind is to adopt real-time calculation mode to obtain.For taking real-time calculation mode, when getting access to the carrier channel that needs polymerization, the gap carrier number that needs between the carrier channel of any two above-mentioned needs polymerizations insert is calculated according to the carrier channel condition of orthogonal constraints at every turn.
Aforesaid way has obtained the required protection bandwidth of each carrier channel respectively; and after the gap carrier number that intermediate demand inserts when any two carrier channels are adjacent at least three carrier channels, can arrange according to gap carrier number that gets access to and protection bandwidth.As previously mentioned, specifically can be the carrier channel arrangement mode of selecting shared bandwidth of all gap carrier waves and protection bandwidth sum minimum.Specifically, sorting and can specifically comprise in the above-mentioned steps 103 according to the configuration information of carrier channel and carrier channel condition of orthogonal constraints carrier channel at least three:
Obtain the gap carrier number that needs insert between any two carrier channels in above-mentioned at least three carrier channel according to described carrier channel configuration information; Wherein, as previously mentioned, this obtains can be to obtain from pre-configured insertion carrier information, also can be to calculate in real time.
According to the gap carrier number that needs between above-mentioned any two carrier channels insert above-mentioned at least three carrier channel is arranged on frequency domain; the multiple carrier channel signal that above-mentioned arrangement generates be the band transmissions of at least one gap carrier wave at the center, and bandwidth that all the gap carrier waves between the carrier channel are shared and the protection bandwidth sum that is arranged in two carrier channels at edge are various arrangement modes minimums.Subcarrier according at least three carrier channels described in the channel of such scheme generation can also be the center symmetric arrays with center gap carrier wave on frequency domain; equally, shared bandwidth of all the gap carrier waves between above-mentioned each carrier channel and the protection bandwidth sum that is arranged in two carrier channels at edge are that various polymerization methodses are minimum.Above-mentioned insertion carrier information can be to generate according to the sub-carrier number of six kinds of carrier channels in the LTE system and carrier channel condition of orthogonal constraints, and above-mentioned insertion carrier information can comprise needs the gap carrier number that inserts between any two carrier channels in above-mentioned six kinds of carrier channels.Insertion carrier information among this embodiment goes for the LTE communication system.
Above-mentioned in addition insertion carrier information can also be to generate according to the sub-carrier number of the carrier channel after six kinds of carrier channels are expanded in the LTE system and carrier channel condition of orthogonal constraints, and comprising in the above-mentioned insertion carrier information that above-mentioned six kinds of carrier channels are expanded needs the gap carrier number that inserts between any two carrier channels in back.The insertion carrier information that provides in the present embodiment goes for the LTE-A communication system.
In addition, the inventor finds that by analyzing for the spectral shaping filtering technique, the bandwidth of roll-offing of its spectral shaping filter can comprise the transmission bandwidth configuration and the boundary belt thereof of edge carrier channel.So, when arranging, the carrier channel of the less protection bandwidth of needs can be arranged on the edge.
Carrier channel condition of orthogonal constraints in the embodiment of the invention can be understood like this.In mobile communication system, use absolute wireless frequency channel number (ARFCN) that the wireless frequency channel is carried out label usually, this label is the frequency resource of a certain frequency band range to be obtained this frequency step by certain frequency step numbering can be described as chnnel coding granularity or chnnel coding grid (Channel Raster), represent frequency step or channel granularity with F1 in the present embodiment, unit is hertz (Hz).The channel granularity is 100kHz in the LTE system, and for i carrier channel (Component Carrier) in the system, its centre frequency (Central Frequency) RF (i) must be on the Frequency point of ARFCN value.For example the ARFCN value of this Frequency point of 2110MHz is 0, then next Frequency point is 2110MHz+100KHz, be 2110.1MHz, its ARFCN value is 1, therefore, the centre frequency RF of each carrier channel (i) or on 2110MHz, perhaps on 2110.1MHz, and can not be on other Frequency point of 2110MHz and 2110.1MHz.When carrier aggregation, any two are numbered i and k carrier channel in the system, and the distance R F between its centre frequency (i)-RF (k) must be the integral multiple of F1.If consider two orthogonalities between the carrier channel on this basis; the subcarrier that must comprise integral multiple between its centre frequency; be distance R F (i)-RF (k) between the centre frequency inevitable also be the bandwidth of subcarrier; be F0; integral multiple; the bandwidth that do not need protection between the carrier channel during carrier aggregation, the bandwidth but two carrier channels that are positioned at the channel edge still need protection, the schematic diagram of carrier aggregation can be as shown in Figure 4.
In sum, when the design multi-carrier OFDM systems, subcarrier width F0, channel granularity F1, the sub-carrier number K (i) in each carrier channel, and the boundary belt on channel both sides can complex optimums.For the orthogonality between the requirement of satisfying the chnnel coding granularity and two carrier channels, and the carrier channel condition of orthogonal constraints of mentioning in the above embodiment of the present invention, distance R F between the centre frequency of two carrier channels (i)-RF (k) must be the integral multiple of F0 and F1, just be the integral multiple of F0 and F1 least common multiple, can represent with F.For the LTE system, the least common multiple F of F0 and F1 is 300kHz.In order to satisfy above-mentioned requirements, usually need between adjacent two sub-carrier channels, insert the gap carrier wave of some, wherein the gap carrier wave between i carrier channel and i+1 the carrier channel is represented with G (i), and need satisfy following formula, and promptly formula one:
(G(i)+1+K(i)/2+K(i+1)/2)*F0＝N*F
Wherein N is the smallest positive integral that satisfies above-mentioned formula one, and for the LTE system, F is 300kHz, and F0 is 15kHz.Can obtain the minimum gap carrier number that each adjacent carrier interchannel needs inserts according to above-mentioned formula one.
For six kinds of carrier channels in the LTE system; its carrier channel configuration information can comprise transport channel configuration information and boundary belt information; wherein the transmission bandwidth configuration information can be by Resource Block number or sub-carrier number; or transmission bandwidth (not comprising the center subcarrier) expression, specifically can be as shown in table 1:
Table 1
According to the subcarrier number of each carrier channel in the table 1, can be got access to by above-mentioned formula needs the sub-carrier number that inserts between above-mentioned any two carrier channels, specifically can be as shown in table 2:
Table 2
In the technical scheme that present embodiment provides, when carrying out the arrangement of carrier channel on frequency domain, select the situation of all gap carrier waves and protection bandwidth sum minimum.Six kinds of carrier channels with LTE are example, channel width is that two carrier channels of 20MHz are adjacent, minimumly need between two carrier channels, insert 19 gap carrier waves, and that channel width is two carrier channels of 20MHz and 1.4MHz is adjacent, minimumly need insert 3 gap carrier waves between two carrier channels.The needed boundary belt of the carrier channel of 20MHz is 0.9925MHz, and the protection channel that the carrier channel of 1.4MHz needs is 0.1525MHz.With 2*20MHz is example, according to the technical scheme that the embodiment of the invention provides various carrier channels is arranged, and wherein the highest a kind of of the availability of frequency spectrum is 1.4MHz+20MHz+20MHz+1.4MHz, specifically can be as shown in Figure 5.Carrier channel polymerization methods shown in Figure 5 can further improve the availability of frequency spectrum, and the boundary belt size is made as 0.6785MHz simultaneously, satisfies the requirement that the inhibition zone external power is revealed.The frequency spectrum that carrier wave arrangement mode shown in Figure 5 is in addition produced is centrosymmetric, and the center of whole frequency band is the gap carrier wave.
Aggregation scheme with 1.4MHz+20MHz+20MHz+1.4MHz is an example; the protection bandwidth of center 20MHz carrier channel is actually 1.4MHz carrier channel and protection amount of bandwidth thereof; substantially exceeded the protection bandwidth constraints about the 20M carrier channel of table 1, thereby be feasible.
Also having another situation is that the carrier channel with appointment is made carrier aggregation in nominated bandwidth.For example, in the bandwidth of 40MHz, make carrier aggregation with 20MHz+20MHz+1.4MHz, according to technical scheme provided by the invention, the carrier channel of 1.4MHz can be placed in the middle of the carrier channel of two 20MHz, specifically can be as shown in Figure 6, need 6 gap carrier waves this moment, and the frequency spectrum after the polymerization can be with a gap carrier wave center symmetry.
In the carrier channel shown in the above-mentioned table 1 is provided with, LTE has only 6 kinds of transmission channel bandwidth configurations, because the band plan of different operators, need the bandwidth of carrier aggregation to have varied, and because the granularity problem of the transmission bandwidth of carrier channel, the band plan that above-mentioned 6 kinds of transmission bandwidths can not well mate different operators when disposing is so can further expand the transmission bandwidth configuration of LTE.
In the embodiment of the invention six kinds of carrier channels of LTE system are expanded and can comprise following technical scheme, carrier channel wherein still based on six kinds of channel widths among the LTE, promptly is respectively 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, and 20MHz are for 3MHz, 5MHz, 10MHz, the carrier channel of 15MHz and 20MHz increases the transmission bandwidth configuration, for example be the carrier channel of 5MHz for channel width, the Resource Block number of its transmission channel configuration is N
RB(i) for satisfying 15＜N
RB(i)≤25 integer number, for the required boundary belt of each carrier channel with reference to LTE according to N
RB(i) size is pressed the special ratios adjustment, for example adjusts according to the number of Resource Block is linear.Specifically can see Table 3:
Table 3
Concrete when carrying out the LTE-A carrier aggregation, its transport channel configuration information can be obtained from table 3, can be that the granularity of transmission channel configured bandwidth increases greatly like this, the channel resource that can better matching varies in size, concrete N in the table 3
RB(i) number can define flexibly according to the needs of carrier aggregation, and table 4 has provided a concrete example, and is as shown in table 4,10MHz and 15MHz has been increased the transmission bandwidth configuration of 27RBs and 54RBs respectively.And increased 80RBs, 81RBs and three kinds of transmission bandwidth configurations of 108RBs for 20MHz, configuration information according to the carrier channel in table 1 and the table 3, can obtain insertion carrier information table as shown in table 4, promptly need the gap carrier number that inserts between two adjacent carrier channels.Table 4 is as seen as follows:
Table 4
When carrying out the carrier channel polymerization; can optimize gap carrier wave and the configuration of protecting bandwidth based on table 3 and table 4 equally; for example work as and use the bandwidth of 29MHz to make the LTE-A carrier aggregation; and guarantee the LTE compatible carrier wave channel of a 20MHz; if LTE transmission bandwidth configuration with 10MHz+20MHz; will cause asymmetrical frequency spectrum; and spectrum efficiency is not high; and based on table 4; can obtain carrier channel polymerization methods as shown in Figure 7; it is the carrier wave arrangement mode of 27RBs+17 gap carrier wave+100RBs+17 gap carrier wave+27RBs; wherein can obtain the required boundary belt of carrier channel of 27RBs according to table 3; this example is adjusted according to the number of Resource Block is linear; then size is 0.26595MHz, and this execution mode has obtained the higher availability of frequency spectrum, is the situation of 29MHz in addition for total bandwidth; boundary belt 0.3625MHz can be made as, the requirement that the inhibition zone external power is revealed can be further satisfied.
In being the frequency range of 80MHz, total bandwidth makes carrier aggregation in addition, if limit the carrier channel configuration that all carrier channels adopt LTE, the technical scheme that adopts the above embodiment of the present invention to provide, can adopt following polymerization methods: 3MHz+3 gap carrier wave+20MHz+19 gap carrier wave+20MHz+19 gap carrier wave+carrier wave+20MHz+3 gap carrier wave+3MHz of 20MHz+19 gap, if adopt Resource Block number and sub-carrier number to be expressed as: 15RBs+3 gap carrier wave+100RBs+19 gap carrier wave+100RBs+19 gap carrier wave+carrier wave+100RBs+3 gap carrier wave+15RBs of 100RBs+19 gap.
In being the frequency range of 80MHz, total bandwidth makes carrier aggregation in addition, if allow to adopt the carrier channel of expansion, as specify with the 20MHz carrier channel of two 108RBs and the 20MHz carrier channel of two 100RBs, the technical scheme that then adopts the above embodiment of the present invention to provide can adopt following polymerization methods: 100RBs+11 gap carrier wave+108RBs+3 gap carrier wave+108RBs+11 gap carrier wave+100RBs.
For example, in being the frequency range of 60MHz, total bandwidth makes carrier aggregation, if limit the carrier channel configuration that all carrier channels adopt LTE, the technical scheme that then adopts the above embodiment of the present invention to provide can adopt following polymerization methods: 6RBs+11 gap carrier wave+100RBs+19 gap carrier wave+100RBs+19 gap carrier wave+100RBs+11 gap carrier wave+6RBs.
For example, in being the frequency range of 60MHz, total bandwidth makes carrier aggregation, if allow to adopt the carrier channel of expansion, as specify with the 20MHz carrier channel of two 108RBs and the 20MHz carrier channel of a 100RBs, the technical scheme that then adopts the above embodiment of the present invention to provide can adopt following polymerization methods: 108RBs+11 gap carrier wave+100RBs+11 gap carrier wave+108RBs.
For example, in being the frequency range of 60MHz, total bandwidth makes carrier aggregation, if allow to adopt the carrier channel of expansion, as specify with the 20MHz carrier channel of two 100RBs and the 20MHz carrier channel of a 108RBs, the technical scheme that then adopts the above embodiment of the present invention to provide can adopt following polymerization methods: 100RBs+11 gap carrier wave+108RBs+11 gap carrier wave+100RBs.
In addition in an embodiment of the present invention, can also comprise following step: the transmission transmission bandwidth information of at least three carrier channels that carrier aggregation is required sends to terminal, so that can proper communication between network side and the terminal, above-mentioned transmission bandwidth configuration information can be the Resource Block number that carrier channel comprises, can also be the information such as size of subcarrier number, transmission bandwidth in addition.
The embodiment of the invention also provides a kind of filtering method based on above-mentioned multiple carrier channel collocation method in addition; in above-mentioned filtering method, on frequency domain, be positioned at the middle carrier channel of frequency band and can use the roll-off bandwidth of the protection bandwidth of shared bandwidth of other carrier channels and edge carrier channel as the spectral shaping filter.Because available protection bandwidth increases, make the complexity of spectral shaping filtering reduce, and distortion significantly reduce.
Corresponding with multiple carrier channel collocation method in the foregoing description, the embodiment of the invention also provides a kind of multiple carrier channel inking device, and the multiple carrier channel inking device that the embodiment of the invention provides can be carried out the multiple carrier channel collocation method that the foregoing description provides.
Fig. 8 is the structural representation of multiple carrier channel fit arrangement embodiment one of the present invention, as shown in Figure 8, the multiple carrier channel inking device comprises determination module 11, acquisition module 12 and channel processing module 13, wherein determination module 11 is used to be identified for the number of the carrier channel of carrier aggregation, and the number of described carrier channel is at least three; Acquisition module 12 is used to obtain the carrier channel configuration information of determination module 11 determined carrier channels; Channel processing module 13 is used for determining described carrier channel putting in order on frequency domain according to described carrier channel configuration information and carrier channel condition of orthogonal constraints; when arranging, determine to arrange the center of signal on the frequency band of the described signal of transmission that the back generates and comprise at least one gap carrier wave, and the shared bandwidth of all the gap carrier waves between the carrier channel and the protection bandwidth sum that is arranged in two carrier channels at edge are that various carrier aggregation modes are minimum.
The multiple carrier channel device that the embodiment of the invention provides is after getting access to the carrier channel configuration information; can arrange on frequency domain carrier channel according to this carrier channel configuration information and carrier channel condition of orthogonal constraints; the multiple carrier channel signal that generates after the above-mentioned arrangement is at least one gap carrier wave at the center of its frequency range that is transmitted, and bandwidth that all the gap carrier waves between each carrier channel are shared and the protection bandwidth sum that is arranged in two carrier channels at edge are that various carrier waves breaths road arrangement mode is minimum.The signal that generates according to such scheme on frequency domain with gap carrier wave center symmetry; and gap carrier wave between each carrier channel and the protection bandwidth sum that is arranged in two carrier channels at edge are that various carrier channel arrangement modes are minimum, can improve the availability of frequency spectrum by above-mentioned technical scheme.
Fig. 9 is the structural representation of multiple carrier channel inking device embodiment two of the present invention, as shown in Figure 2, device comprises determination module 21, acquisition module 22 and channel processing module 23, wherein determination module 21 is used to be identified for the number of the carrier channel of carrier aggregation, and the number of described carrier channel is at least three; Acquisition module 22 can specifically comprise first acquiring unit 221; this unit is used for obtaining from the configuration information of each pre-configured carrier channel the transmission bandwidth configuration information and the protection bandwidth information of determined carrier channel, and the configuration information of described each carrier channel comprises the carrier channel configuration information after carrier channel is expanded in the configuration information of carrier channel in the LTE system and/or the LTE system.
Can further include in the foregoing description inserted the carrier information generation unit, this insertion carrier information generation unit is used for generating according to the sub-carrier number of LTE system carrier channel and carrier channel condition of orthogonal constraints and inserts carrier information, and comprising in the described insertion carrier information needs the gap carrier number that inserts between any two carrier channels in the described carrier channel; Perhaps insert the sub-carrier number of the carrier channel after the carrier information generation unit is used for expanding according to LTE system carrier channel and carrier channel condition of orthogonal constraints and generate and insert carrier information, described insertion carrier information comprises that described carrier channel is expanded needs the gap carrier number that inserts between any two carrier channels in back; Above-mentioned second acquisition unit is used for the insertion carrier information that generates according to described insertion carrier information generation unit, and obtaining needs the gap carrier number that inserts between any two carrier channels in the determined carrier channel.
On the basis of the foregoing description, multiple carrier channel signal configures device can further include sending module, and this sending module is used for the transmission bandwidth configuration information of at least three carrier channels is sent to terminal respectively.
The multiple carrier channel inking device that the embodiment of the invention provides; at first obtain the configuration information of at least three carrier channels that are used to carry out carrier aggregation; and above-mentioned carrier channel is carried out the arrangement of carrier channel on frequency domain according to the configuration information and the carrier channel condition of orthogonal constraints of this multiple carrier channel; the subcarrier of at least three carrier channels in the channel that generates after carrying out carrier aggregation is the center symmetric arrays with the gap carrier wave on frequency domain, and bandwidth that all the gap carrier waves between above-mentioned each carrier channel are shared and the protection bandwidth sum that is arranged in two carrier channels at edge are that various carrier channel polymerization methodses are minimum.The above-mentioned carrier channel that needs polymerization can be six kinds of carrier channels in the LTE system simultaneously.It also can be the carrier channel after six kinds of carrier channels are expanded in the LTE system.The technical scheme that the above embodiment of the present invention provides can provide the availability of frequency spectrum.
The embodiment of the invention also provides a kind of communication system, includes above-mentioned multiple carrier channel inking device in this communication system.
The multiple carrier channel inking device that is provided with in the communication system that the embodiment of the invention provides; after getting access to the carrier channel configuration information; can arrange on frequency domain carrier channel according to this configuration information and carrier channel condition of orthogonal constraints; the multiple carrier channel signal that above-mentioned arrangement generates be the band transmissions of at least one gap carrier wave at the center, and bandwidth that all the gap carrier waves between above-mentioned each carrier channel are shared and the protection bandwidth sum that is arranged in two carrier channels at edge are various carrier wave arrangement modes minimums.Particularly the signal that generates of polymerization on frequency domain with gap carrier wave center symmetry; and gap carrier wave between each carrier channel and the protection bandwidth sum that is arranged in two carrier channels at edge are that various carrier wave arrangement modes are minimum, can improve the availability of frequency spectrum by above-mentioned technical scheme.
In the above embodiment of the present invention, the multiple carrier channel inking device can be arranged in base station or the relay station, above-mentioned in addition communication system can be the communication system based on OFDM OFDM modulation technique, and further can be LTE communication system, LTE-A communication system or WiMax communication system.
Multiple carrier channel collocation method, device and communication system that the embodiment of the invention provides; after getting access to the carrier channel configuration information; can arrange on frequency domain carrier channel according to this configuration information and carrier channel condition of orthogonal constraints; arranging the multiple carrier channel signal that the back generates be the band transmissions of at least one gap carrier wave at the center, and bandwidth that all the gap carrier waves between above-mentioned each carrier channel are shared and the protection bandwidth sum that is arranged in two carrier channels at edge are various carrier channel arrangement modes minimums.Particularly the signal that generates of polymerization on frequency domain with gap carrier wave center symmetry; and gap carrier wave between each carrier channel and the protection bandwidth sum that is arranged in two carrier channels at edge are that various carrier channel arrangement modes are minimum, can improve the availability of frequency spectrum by above-mentioned technical scheme.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
It should be noted that at last: above embodiment is only in order to technical scheme of the present invention to be described but not limit it, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that: it still can make amendment or be equal to replacement technical scheme of the present invention, and these modifications or be equal to replacement and also can not make amended technical scheme break away from the spirit and scope of technical solution of the present invention.
Claims (14)
1. a multiple carrier channel collocation method is characterized in that, comprising:
Be identified for the number of the carrier channel of carrier aggregation, the number of described carrier channel is at least three;
Obtain the carrier channel configuration information of determined carrier channel;
Determine described carrier channel putting in order on frequency domain according to described carrier channel configuration information and carrier channel condition of orthogonal constraints; when arranging, determine to arrange the center of signal on the frequency band of the described signal of transmission that the back generates and comprise at least one gap carrier wave, and the shared bandwidth of all the gap carrier waves between the carrier channel and the protection bandwidth sum that is arranged in two carrier channels at edge are that various carrier aggregation modes are minimum.
2. method according to claim 1 is characterized in that, the described carrier channel configuration information that obtains determined carrier channel comprises:
From the configuration information of each pre-configured carrier channel, obtain the transmission bandwidth configuration information and the protection bandwidth information of determined carrier channel.
3. method according to claim 1 is characterized in that, the configuration information of described carrier channel comprises the carrier channel configuration information after carrier channel is expanded in the configuration information of carrier channel in the LTE system and/or the LTE system.
4. method according to claim 1 is characterized in that, described carrier channel condition of orthogonal constraints comprises: the distance that is used between the centre frequency of any two carrier channels of carrier aggregation is the bandwidth of subcarrier and the integral multiple of frequency step.
5. method according to claim 1 is characterized in that, describedly determines that according to described carrier channel configuration information and carrier channel condition of orthogonal constraints described carrier channel putting in order on frequency domain comprises:
Is that center carry out symmetric arrays with center gap carrier wave with the subcarrier of determined carrier channel on frequency domain, when described carrier channel number is even number, described carrier channel is divided into identical two groups, be separately positioned on gap carrier wave both sides, described center, and the subcarrier that makes described at least three carrier channels is the center symmetry with described center gap carrier wave on frequency domain; And/or,
When described carrier channel number is odd number, described carrier channel is divided into identical two groups and a carrier channel that is positioned at the frequency domain center, the described subcarrier that is positioned at the carrier channel at frequency domain center is the center symmetric arrays with center gap carrier wave, the subcarrier of described identical two groups of carrier channels is separately positioned on the both sides of the carrier channel that is positioned at the frequency domain center, and is the center symmetry with the described carrier channel that is positioned at the frequency domain center.
6. method according to claim 1; it is characterized in that; describedly determine described carrier channel putting in order on frequency domain according to described carrier channel configuration information and carrier channel condition of orthogonal constraints; the protection bandwidth sum of determining the bandwidth that all gap carrier waves between the carrier channel are shared and be arranged in two carrier channels at edge when arranging is that various carrier aggregation modes are minimum, comprising:
Obtaining needs the gap carrier number that inserts between any two carrier channels in the determined carrier channel, described gap carrier number obtains from pre-configured insertion carrier information according to described carrier channel configuration information; Perhaps, according to the carrier channel condition of orthogonal constraints gap carrier number that needs insert between any two carrier channels in the determined carrier channel is calculated acquisition;
Obtain the required protection bandwidth of each carrier channel;
Gap carrier number and the required protection bandwidth of each carrier channel according to needs insertion between described any two carrier channels; determine described carrier channel putting in order on frequency domain, and the protection bandwidth sum of determining the bandwidth that all gap carrier waves between the carrier channel are shared when arranging and being arranged in two carrier channels at edge is that various carrier aggregation modes are minimum.
7. method according to claim 6, it is characterized in that, described insertion carrier information generates according to the sub-carrier number of carrier channel in the LTE system and carrier channel condition of orthogonal constraints, and described insertion carrier information comprises needs the gap carrier number that inserts between any two carrier channels in the described LTE system carrier channel; Perhaps
Described insertion carrier information generates according to the sub-carrier number of the carrier channel after carrier channel is expanded in the LTE system and carrier channel condition of orthogonal constraints, and described insertion carrier information comprises that described LTE system carrier channel is expanded needs the gap carrier number that inserts between any two carrier channels in back.
8. according to claim 3 or 7 described methods, it is characterized in that, described carrier channel in the LTE system expanded, comprise following any one or combination in any:
To channel width is the carrier channel of 3M, and the Resource Block number N of its transmission bandwidth configuration information is set
RB(i) value is 7＜N
RB(i)≤15, the protection bandwidth BW of carrier channel
Guardband(i) be: BW
Guardband(i)≤0.1425;
To channel width is the carrier channel of 5M, and the Resource Block number N of its transmission bandwidth configuration information is set
RB(i) value is 15＜N
RB(i)≤25, the protection bandwidth BW of carrier channel
Guardband(i) be: 0.1425＜BW
Guardband(i)≤0.2425;
To channel width is the carrier channel of 10M, and the Resource Block number N of its transmission bandwidth configuration information is set
RB(i) value is 25＜N
RB(i)≤50, the protection bandwidth BW of carrier channel
Guardband(i) be: 0.2425＜BW
Guardband(i)≤0.4925;
To channel width is the carrier channel of 15M, and the Resource Block number N of its transmission bandwidth configuration information is set
RB(i) value is 50＜N
RB(i)≤75, the protection bandwidth BW of carrier channel
Guardband(i) be: 0.4925MHz＜BW
Guardband(i)≤0.7425MH;
To channel width is the carrier channel of 20M, and the Resource Block number N of its transmission bandwidth configuration information is set
RB(i) value is 75＜N
RB(i)≤110, the protection bandwidth BW of carrier channel
Guardband(i) be: 0.7425MHz＜BW
Guardband(i)≤0.9925MH;
Described channel width is that the transmission bandwidth value of transmission bandwidth configuration information of the carrier channel of 3M, 5M, 10M, 15M and 20M is N
RB(i) * 0.18MHz.
9. method according to claim 1 is characterized in that, comprising:
On frequency domain, be positioned at the middle carrier channel of channel and use the roll-off bandwidth of the protection bandwidth of shared bandwidth of other carrier channels and edge carrier channel as the spectral shaping filter.
10. a multiple carrier channel inking device is characterized in that, comprising:
Determination module is used to be identified for the number of the carrier channel of carrier aggregation, and the number of described carrier channel is at least three;
Acquisition module is used to obtain the carrier channel configuration information of the determined carrier channel of determination module;
Channel processing module; be used for determining described carrier channel putting in order on frequency domain according to described carrier channel configuration information and carrier channel condition of orthogonal constraints; when arranging, determine to arrange the center of signal on the frequency band of the described signal of transmission that the back generates and comprise at least one gap carrier wave, and the shared bandwidth of all the gap carrier waves between the carrier channel and the protection bandwidth sum that is arranged in two carrier channels at edge are that various carrier aggregation modes are minimum.
11. device according to claim 10 is characterized in that, described acquisition module comprises:
First acquiring unit; be used for obtaining from the configuration information of each pre-configured carrier channel the transmission bandwidth configuration information and the protection bandwidth information of determined carrier channel, the configuration information of described each carrier channel comprises the carrier channel configuration information after carrier channel is expanded in the configuration information of carrier channel in the LTE system and/or the LTE system.
12. device according to claim 10 is characterized in that, described channel processing module comprises:
Second acquisition unit is used for obtaining and needs the gap carrier number that inserts between any two carrier channels of determined carrier channel, and described gap carrier number obtains from pre-configured insertion carrier information according to described carrier channel configuration information; Perhaps, according to the carrier channel condition of orthogonal constraints gap carrier number that needs insert between any two carrier channels in the determined carrier channel is calculated acquisition;
The 3rd acquiring unit is used to obtain the required protection bandwidth of each carrier channel;
The multiple carrier channel signal processing unit; the gap carrier number that needs insert between two carrier channels that be used for obtaining according to described second acquisition unit, any; and described the 3rd acquiring unit protection bandwidth that obtain, that each carrier channel is required; determine described carrier channel putting in order on frequency domain, and the protection bandwidth sum of determining the bandwidth that all gap carrier waves between the carrier channel are shared when arranging and being arranged in two carrier channels at edge is that various carrier aggregation modes are minimum.
13. device according to claim 12 is characterized in that, described device further comprises: insert the carrier information generation unit,
Described insertion carrier information generation unit is used for generating according to the sub-carrier number of LTE system carrier channel and carrier channel condition of orthogonal constraints and inserts carrier information, and comprising in the described insertion carrier information needs the gap carrier number that inserts between any two carrier channels in the carrier channel of described LTE system; Or
The sub-carrier number of the carrier channel after described insertion carrier information generation unit is used for expanding according to LTE system carrier channel and carrier channel condition of orthogonal constraints generate inserts carrier information, and described insertion carrier information comprises that the carrier channel of described LTE system is expanded needs the gap carrier number that inserts between any two carrier channels in back;
Described second acquisition unit is used for the insertion carrier information that generates according to described insertion carrier information generation unit, and obtaining needs the gap carrier number that inserts between any two carrier channels in the determined carrier channel.
14. a communication system is characterized in that, comprises the arbitrary described multiple carrier channel inking device of aforesaid right requirement 10-13.
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